| roplet dynamics and heat transfer on the rotating disk have been analytically and experimentally investigated. The parametric effects of droplet size, angular velocity of a disk, initial velocity of droplet, properties of liquid, and hot wall temperature were systematically studied. Reciprocal action between the swirl flow created by the rotating disk and the single droplet has been analytically solved, and compared with experimental results. The droplet impacting heat transfer on a hot rotating surface, which has strong dependence on those parameters has been experimentally investigated. The main issues were whether the droplets were in direct contact with a hot moving surface or not, and how long the droplets resided on the hot surface if direct contact took place.;It was observed that the coupling effects of the drag and flow nonuniformity caused lift to reach maximum value in the gas phase. In this region, droplets were presumed to bounce off without contacting with the rotating disk. When the impaction angle reached around 15;Mono-sized droplets have been generated using an impulse-jet droplet generator, and two different test liquids such as distilled water and 99% ethanol have been used. Five different droplet sizes (300, 400, 600, 900, and 1200... |
